أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " صَلاَةُ الْجَمَاعَةِ تَفْضُلُ عَلَى صَلاَةِ الْفَذِّ بِسَبْعٍ وَعِشْرِينَ دَرَجَةً " .
It was narrated from Ibn 'Umar that the Messenger of Allah (PBUH) said: "Praying in congregation is twenty-seven times better than praying alone." Translation Not Available
Book Ref: Sunan An Nisai Book 10 Hadith 837
Web Ref: Sunan An Nisai Vol 1 Book 10 Hadith 838